tests: update some clonebundles expectations to pass on both pure and non-pure
Specifically, zstd isn't available in --pure mode, and we need to glob
off the leading comma as well as the absent compression engine.
Differential Revision: https://phab.mercurial-scm.org/D859
#require docutils gettext
$ $TESTDIR/check-gendoc pt_BR
checking for parse errors